<!DOCTYPE html>
<html lang="zh-CN">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>熙康健康系统</title>
    <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/6.4.0/css/all.min.css">
    <style>
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
        }
        
        :root {
            --primary: #1a73e8;
            --primary-dark: #0d47a1;
            --secondary: #4caf50;
            --light: #f8f9fa;
            --dark: #202124;
            --gray: #5f6368;
            --light-gray: #dadce0;
            --white: #ffffff;
            --danger: #f44336;
            --warning: #ff9800;
            --card-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
        }
        
        body {
            background-color: #f0f7ff;
            color: var(--dark);
            line-height: 1.6;
        }
        
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        
        /* 头部样式 */
        header {
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            color: var(--white);
            padding: 15px 0;
            position: sticky;
            top: 0;
            z-index: 100;
            box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
        }
        
        .header-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        
        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.8rem;
            font-weight: 700;
        }
        
        .logo i {
            color: var(--secondary);
        }
        
        nav ul {
            display: flex;
            list-style: none;
            gap: 25px;
        }
        
        nav a {
            color: var(--white);
            text-decoration: none;
            font-weight: 500;
            font-size: 1.1rem;
            padding: 8px 12px;
            border-radius: 4px;
            transition: all 0.3s ease;
        }
        
        nav a:hover, nav a.active {
            background-color: rgba(255, 255, 255, 0.15);
        }
        
        .user-actions {
            display: flex;
            align-items: center;
            gap: 15px;
        }
        
        .btn {
            padding: 10px 20px;
            border-radius: 50px;
            border: none;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.3s ease;
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }
        
        .btn-primary {
            background-color: var(--secondary);
            color: var(--white);
        }
        
        .btn-outline {
            background-color: transparent;
            border: 2px solid var(--white);
            color: var(--white);
        }
        
        .btn:hover {
            transform: translateY(-2px);
            box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
        }
        
        /* 主内容区 */
        .main-content {
            min-height: calc(100vh - 150px);
            padding: 40px 0;
        }
        
        .page {
            display: none;
            animation: fadeIn 0.5s ease;
        }
        
        .page.active {
            display: block;
        }
        
        @keyframes fadeIn {
            from { opacity: 0; transform: translateY(20px); }
            to { opacity: 1; transform: translateY(0); }
        }
        
        .page-header {
            margin-bottom: 30px;
            text-align: center;
        }
        
        .page-title {
            font-size: 2.2rem;
            color: var(--primary-dark);
            margin-bottom: 10px;
        }
        
        .page-subtitle {
            color: var(--gray);
            font-size: 1.1rem;
            max-width: 700px;
            margin: 0 auto;
        }
        
        /* 卡片样式 */
        .card {
            background: var(--white);
            border-radius: 12px;
            box-shadow: var(--card-shadow);
            padding: 25px;
            margin-bottom: 25px;
            transition: transform 0.3s ease;
        }
        
        .card:hover {
            transform: translateY(-5px);
        }
        
        .card-header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: 20px;
            padding-bottom: 15px;
            border-bottom: 1px solid var(--light-gray);
        }
        
        .card-title {
            font-size: 1.4rem;
            color: var(--primary-dark);
        }
        
        /* 登录页面 */
        .login-container {
            max-width: 450px;
            margin: 0 auto;
            background: var(--white);
            padding: 40px;
            border-radius: 16px;
            box-shadow: var(--card-shadow);
        }
        
        .form-group {
            margin-bottom: 25px;
        }
        
        .form-group label {
            display: block;
            margin-bottom: 8px;
            font-weight: 500;
            color: var(--dark);
        }
        
        .form-control {
            width: 100%;
            padding: 14px;
            border: 1px solid var(--light-gray);
            border-radius: 8px;
            font-size: 1rem;
            transition: border-color 0.3s ease;
        }
        
        .form-control:focus {
            border-color: var(--primary);
            outline: none;
            box-shadow: 0 0 0 3px rgba(26, 115, 232, 0.2);
        }
        
        .remember-forgot {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: 25px;
        }
    </style>
</head>
<body>
    <!-- 头部导航 -->
    <header>
        <div class="container header-container">
            <div class="logo">
                <i class="fas fa-heartbeat"></i>
                <span>熙康健康系统</span>
            </div>
            <nav>
                <ul>
                    <li><a href="#" class="nav-link active" data-page="home">登录</a></li>
                    <li><a href="#" class="nav-link" data-page="appointments">首页</a></li>
                    <li><a href="#" class="nav-link" data-page="hospitals">体检预约</a></li>
                    <li><a href="#" class="nav-link" data-page="symptoms">预约列表</a></li>
                    <li><a href="#" class="nav-link" data-page="advice">体检客户查询</a></li>
                </ul>
            </nav>
            <div class="user-actions">
                <button class="btn btn-outline" id="loginBtn"><i class="fas fa-user"></i> 登录</button>
            </div>
        </div>
    </header>
    
    <!-- 主内容区 -->
    <div class="container main-content">
        <!-- 登录页面 -->
        <div class="page active" id="home">
            <div class="login-container">
                <div class="page-header">
                    <h2 class="page-title">欢迎使用熙康健康系统</h2>
                    <p class="page-subtitle">登录以访问您的健康档案、预约医生和获取个性化健康建议</p>
                </div>
                
                <form id="loginForm">
                    <div class="form-group">
                        <label for="username">用户名</label>
                        <input type="text" id="username" class="form-control" placeholder="请输入用户名" required>
                    </div>
                    
                    <div class="form-group">
                        <label for="password">密码</label>
                        <input type="password" id="password" class="form-control" placeholder="请输入密码" required>
                    </div>
                    
                    <div class="remember-forgot">
                        <div>
                            <input type="checkbox" id="remember">
                            <label for="remember">记住我</label>
                        </div>
                        <a href="#" style="color: var(--primary);">忘记密码?</a>
                    </div>
                    
                    <button type="submit" class="btn btn-primary" style="width: 100%;">
                        <i class="fas fa-sign-in-alt"></i> 登录
                    </button>
                    
                    <div style="text-align: center; margin-top: 20px;">
                        <p>还没有账号? <a href="#" style="color: var(--primary);">立即注册</a></p>
                    </div>
                </form>
            </div>
        </div>
        
        <!-- 页脚 -->
        <footer>
            <div class="container footer-content">
                <div class="logo" style="justify-content: center; margin-bottom: 20px;">
                    <i class="fas fa-heartbeat" style="color: var(--secondary);"></i>
                    <span>熙康健康系统</span>
                </div>
                
                <div class="footer-links">
                    <a href="#"><i class="fas fa-info-circle"></i> 关于我们</a>
                    <a href="#"><i class="fas fa-envelope"></i> 联系我们</a>
                    <a href="#"><i class="fas fa-shield-alt"></i> 隐私政策</a>
                    <a href="#"><i class="fas fa-file-contract"></i> 服务条款</a>
                    <a href="#"><i class="fas fa-question-circle"></i> 帮助中心